Research Achievements - Other -
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Nonlinear Effect of Spin-Torque Ferromagnetic Resonance in Py/Pt Bilayers
児玉俊之, 菊池伸明, 千葉貴裕, 岡本聡, 岡本聡, 大野誠吾, 冨田知志, 冨田知志
応用物理学会秋季学術講演会講演予稿集(CD-ROM) 84th 2023
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Spin-current Induced Permeability Control of NiFe Wires towards Time-varying Metamaterials
児玉俊之, 菊池伸明, 岡本聡, 岡本聡, 大野誠吾, 冨田知志, 冨田知志
応用物理学会春季学術講演会講演予稿集(CD-ROM) 70th 2023
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Spin-injection Induced Permeability Control for Time-varying Metamaterials
児玉俊之, 清水蓮也, 菊池伸明, 岡本聡, 岡本聡, 大野誠吾, 冨田知志, 冨田知志
日本磁気学会学術講演概要集 47th 2023
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Permeability Control of Co Wires by Spin-current Injection for Time-varying Metamaterials
清水蓮也, 児玉俊之, 菊池伸明, 岡本聡, 岡本聡, 大野誠吾, 冨田知志, 冨田知志
応用物理学会春季学術講演会講演予稿集(CD-ROM) 70th 2023
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Permeability control for time-varying metamaterials
MAG22146 2022.11
Summary of the papers read (national conference and other science council)
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Permeability Control of Magnetic Materials towards Time-varying Metamaterials
児玉俊之, 黒澤裕之, 大野誠吾, 菊池伸明, 畑山正寿, 岡本聡, 岡本聡, 冨田知志, 冨田知志
応用物理学会秋季学術講演会講演予稿集(CD-ROM) 83rd 2022
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Microwave Frequency Conversion Using Time-Varying Permeability Metamaterials
児玉俊之, 黒澤裕之, 大野誠吾, 菊池伸明, 畑山正寿, 岡本聡, 岡本聡, 冨田知志, 冨田知志
日本磁気学会学術講演概要集 46th 2022
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Effect of thermal fluctuations on microwave assisted switching in Co/Pt nanodot array
45 ( 14 ) 7 - 11 2021.06
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竹内誠, 芳賀僚太, 菊池伸明, 岡本聡, 鈴木基寛, 小林慎太郎, 中村哲也, 中村哲也, 大久保忠勝, 埋橋淳, 宇根康裕
電気学会研究会資料 MAG-20 ( MAG-20-108-115 ) 113 - 32 2020.12
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Microwave assisted magnetization switching experiments on CoCrPt granular media
43 ( 15 ) 9 - 14 2019.06
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Microwave assisted magnetization switching experiments on CoCrPt granular media
119 ( 79 ) 9 - 14 2019.06
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FORC analysis on Nd-Fe-B sintered magnets
宮澤 和則, 岡本 聡, 蓬田 貴裕, 菊池 伸明, 北上 修
電気学会研究会資料. MAG = The papers of technical meeting on magnetics, IEE Japan ( 電気学会 ) 2018 ( 184 ) 35 - 40 2018.12
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Ultra-high sensitive magnetization measurement for a very small area of Nd-Fe-B hot-deformed magnet using anomalous Hall effect
蓬田 貴裕, 岡本 聡, 菊池 伸明, 北上 修, Sepehri-Amin H, 大久保 忠勝, 宝野 和博, 秋屋 貴博, 服部 篤, 日置 敬子
電気学会研究会資料. MAG = The papers of technical meeting on magnetics, IEE Japan ( 電気学会 ) 2018 ( 81 ) 65 - 69 2018.08
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Microwave assisted switching behavior on CoCrPt-TiO2 granular media
菊池 伸明, 島田 恭平, 島津 武仁, 岡本 聡, 北上 修
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 ( 電子情報通信学会 ) 117 ( 501 ) 45 - 49 2018.03
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Magnetization switching in a dipolar coupled magnetic nanodot under the assistance of microwave field
金原 大樹, 岡本 聡, 菊池 伸明, 北上 修, 島津 武仁
電気学会研究会資料. MAG = The papers of technical meeting on magnetics, IEE Japan ( 電気学会 ) 2017 ( 138 ) 21 - 25 2017.11
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Magnetization switching of a dipolar coupled layered magnetic nanodot under the assistance of microwave
金原 大樹, 岡本 聡, 菊池 伸明, 北上 修, 島津 武仁
映像情報メディア学会技術報告 = ITE technical report ( 映像情報メディア学会 ) 41 ( 17 ) 53 - 58 2017.06
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Magnetization switching of a dipolar coupled layered magnetic nanodot under the assistance of microwave
金原 大樹, 岡本 聡, 菊池 伸明, 北上 修, 島津 武仁
電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 ( 電子情報通信学会 ) 117 ( 80 ) 53 - 58 2017.06
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Magnetization Reversal of Nd-Fe-B Thin Film under a Nano-second Pulse Magnetic Field
Kadonosawa Kazuya, Kikuchi Nobuaki, Goto Ryota, Okamoto Satoshi, Kitakami Osamu
IEEJ Transactions on Fundamentals and Materials ( The Institute of Electrical Engineers of Japan ) 137 ( 7 ) 374 - 379 2017 [Refereed]
<p>The magnetization reversal process of Nd-Fe-B magnets has been long discussed. Since the elemental steps of the magnetization reversal process such as a nucleation of reversed embryo and a wall depinning are the events as small as nano-meter scale and as fast as nano/subnano-second time scale, the study on the magnetization reversal with these space and time regions are essentially important. In this work, a generation of large amplitude nano-second pulse field and a fabrication of Nd-Fe-B nanodot were examined, and then the magnetization reversal process of the Nd-Fe-B nanodot under the nano-second pulse field was investigated. Combination of a Blumlein transmission line and a micro-coil enables to generate a pulse field of 0.87 T in amplitude and 6 ns in width. It was clearly demonstrated that the reversed domain evolution in the dot under the pulse field was quite different from that under the static field, probably owing to the dispersion of energy barrier of each elemental magnetization reversal step.</p>